Twyer.



No. 874,893. PATENTED DEC. 24, 1907.

H. B. KBIPBR.

TWYER.

APPLICATION FILED MAR. 1. 1905.

)1) bl m mom a (Tm v 0141A HENRY B. KEIPER, OF LANCASTER, PENNSYLVANIA.

TWYER.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filed March 1. 1905. Serial No. 24%884.

To allwhom it may concern:

Be it known that I, HENRY B. KEIPER, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Twyers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to twyers or twyerirons for forges, wherein the blast is delivered from the blast-pipe through draft-issues in the fire-bed; and the objects are to simplify and improve the general construction of twyers of this character, adapt the same for practical use in connection with forges, and increase the efficiency of operation with a view to producing a deeper, hotter and more effective fire while saving fuel by consuming all the heating elements thereof.

The invention will hereinafter be first fully described with reference to the accompanying drawings, which form a part of this specification, and then be more particularly pointed out and defined in the appended claims.

In said drawings, Figure 1 is a perspective view of my improved tvq er, and Fig. 2 is a central vertical section thereof taken longitudinally of the blast pipe. I

The twyer is a hollow pot-shaped body or casing, made preferably of heavy cast iron. It is shown cast in two parts, A and B, mounted one upon the other the neck of the lower part A being joined to the bottom of the upper part B. It may of course be cast in one part, or in a number of parts bolted or otherwise suitably connected together; but for simplicity of construction the arrangement shown is preferred, the neck or top of the lower casing A being rabbeted or having a surrounding flange or shoulder a, while the bottom of the upper casting B fits therein, the two parts being secured together by bolts or screws 6 engaging in looks or ears in the respective parts. As shown, the lower casting A is the usual hollow elbow-casting or pot-shaped twyer-pipe, having a lateral blast pipe O, and having a bottom opening provided with a valve or adjustable cover D which can be opened to the extent desired either for allowing the escape of clinkers and cinders or for affording a natural draft to keep the fire alive when the blast is shut off from the blast pipe 0. The upper casting B, seated on and bolted to the neck of the lower casting as aforesaid, is a casting having an enlarged or flaring top, preferably substantially rectangular, shown having a surrounding horizontal flange b; and said upper casting is constructed with a deep pocket-shaped partition B integral and merged with the interior walls of the body; said partition B providing a deep nest or valley-shaped firebed whose opposite sides slant oppositely downward from the top to the middle bottom portion of the nest.

The blast from the blast-pipe is delivered up into the nest through three parallel slots E in the bottom part of the partition B. One of these slots is at the middle or bottom of the nest; the other two slots are opposite each other in the inclined sides or above the middle bottom slot. The two side slots are oppositely angled, preferably each at fortyfive degrees, so as to direct the lateral crossblasts issuing therefrom into the medial vertical blast, thus delivering all the blast into. the center of the fire-bed along a line a little above the bottom, as about two inches. By forcing the blast through the two side angled slots convergingly upwards, and at the same time from the center slot directly u wards, the slots being formed in the thick wa l of the partition B, the blast from the three directions is forced into the center of the fire to an angular edge, and the blast must find its own course from this edge. The blast coming from the three distinct directions creates a current which produces a whirling or rolling upward blast, forcing the blast through the coal or fuel out to the walls of the deep nest and back to the center, giving the metal in the fire all the heating elements in the fuel and producing a deep white-heat fire. The iron or metal in the fire can be heated more quickly, besides saving at least ten per-cent. in coal bills, by consuming all the heating elements in the coal. The fire is hottest at the center, therefore heating the metal from the center to its edges, which in many kinds of work is an advantage and saves the burning of edges.

The twyer is further provided with an attachment F, operated by the crank or handle G, for knocking out clinkers and cinders from the side slots. This attachment F comprises a T-shaped hammer, mounted on the shaft of the crank or handle G, and ada ted to be turned or rocked to knock out clin rers and cinders from either side slot, the oppo site ends of the T-head of the hammer entering the opposite slots. Therefore the slots can always be kept open without disturbing the fire from above, assuring at all times a full capacity of draft and a clean and powerful fire under all circumstances.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is A twyer comprising a hollow pot-shaped body having a flaring upper portion interiorly formed with a deep pocket-shaped partition constituting a nest and having oppositely inclined sides extending downward from the opposite side walls of said body, said partition being integral with the walls of said body and merging therewith near the top thereof, and the bottom of said partition being provided with elongated parallel slots arranged longitudinally of the sides of said nest and extending substantially the full length of the bottom thereof, the middle slot being in the lowest part of the nest and the others at opposite sides thereof being angled. to deliver their blasts convergingly upward into the blast issuing from the middle slot, and said body having a blast-inlet below said partition.

In testimony whereof I affix my signature, in presence of two witnesses.

' HENRY B. KEIPER.

Witnesses L. B. KEIPER, Enw. R. I-IEITsI-IU. 

